GS Yuasa Gains on Sign Battery Probe Ending Soon: Tokyo Mover

GS Yuasa Corp., a Japanese battery maker, rose the most in a month in Tokyo trading after Mitsubishi Motors Corp. said it aims to complete a probe this month into overheating in cells made by a unit of the company.

The manufacturer of lithium-ion batteries climbed 4.7 percent, the most since March 8, to 399 yen at the close in Tokyo trading. The Nikkei 225 Stock Average advanced 2 percent.

Mitsubishi Motors’ investigation of overheating batteries in its Highlander hybrid found one cell that had a misshapen electrode that may have been the result of excessive force, the automaker told reporters yesterday in Tokyo. Batteries used in the vehicles were made at a factory jointly owned by the Tokyo-based carmaker, Yuasa and Mitsubishi Corp.

GS Yuasa, which also makes the lithium-ion batteries used in Boeing Co.’s 787 jet, tumbled 11 percent the day after Mitsubishi Motors said batteries made at the factory overheated.

GS Yuasa and Boeing have said the batteries are different from ones used in the 787s. The jets were removed from commercial service in January after batteries overheated on a Japan Airlines Co. plane in Boston and during an All Nippon Airways Co. flight in Japan.

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